@charset "UTF-8";
* {
  box-sizing: border-box;
}

a {
  color: #1B9AAA;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
a:hover {
  color: #14727e;
}
a:focus, a:active {
  color: #0d4a52;
}

body,
html {
  position: relative;
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  font-family: "Arvo", Helvetica, sans-serif;
  font-family: 12px;
  color: #555;
  background: #F8FFE5;
}

strong {
  font-weight: bold;
}

p {
  line-height: 1.6;
}

.inspired {
  margin-top: 1em;
  font-size: 0.9rem;
  color: #9a9a95;
}

header {
  color: #F8FFE5;
  text-align: center;
}
header span {
  display: inline-block;
  box-sizing: border-box;
  width: 4rem;
  height: 4rem;
  line-height: 4rem;
  margin: 0 0.4rem;
  background: #FFC43D;
}
header span:nth-of-type(2) {
  background: #EF476F;
}
header span:nth-of-type(3) {
  background: #1B9AAA;
}
header span:nth-of-type(4) {
  background: #06D6A0;
}

h1 {
  font-size: 2.2rem;
}

.directions {
  padding: 2rem;
  border-top: 1px solid #9a9a95;
  border-bottom: 1px solid #9a9a95;
}

.container {
  margin: 0 auto;
  padding-bottom: 3.5rem;
  -webkit-box-flex: 1;
      -ms-flex: 1;
          flex: 1;
  width: 100%;
  max-width: 550px;
  text-align: center;
}
header .container {
  padding: 0;
  padding: 2rem 4rem;
  max-width: 900px;
}

.scores {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}

.score-container {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  margin: 1.8rem;
  font-size: 1.2rem;
  line-height: 1;
  color: #555;
}
.score-container.best-score {
  color: #9a9a95;
}

.score {
  margin-left: 1rem;
  position: relative;
  font-weight: bold;
  font-size: 1.5rem;
  vertical-align: middle;
  text-align: right;
}

.game {
  position: relative;
  margin: 0 auto;
  background: #9a9a95;
  padding: 7px;
  display: inline-block;
  border-radius: 3px;
  box-sizing: border-box;
}

.tile-container {
  border-radius: 6px;
  position: relative;
  width: 400px;
  height: 400px;
}

.tile, .background {
  display: block;
  color: #F8FFE5;
  position: absolute;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  text-align: center;
}

.background {
  z-index: 1;
  text-align: center;
  border: 7px solid #9a9a95;
  background-color: #F8FFE5;
}

.tile {
  opacity: 0;
  z-index: 2;
  background: #FFC43D;
  color: #F8FFE5;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  font-size: 1.8rem;
  align-items: center;
  -webkit-transition: 110ms ease-in-out;
  transition: 110ms ease-in-out;
  border-radius: 3px;
  border: 7px solid #9a9a95;
  box-sizing: border-box;
}
.tile--4 {
  background: #EF476F;
  color: #F8FFE5;
}
.tile--8 {
  background: #1B9AAA;
  color: #F8FFE5;
}
.tile--16 {
  background: #06D6A0;
  color: #F8FFE5;
}
.tile--32 {
  background: #f37694;
  color: #F8FFE5;
}
.tile--64 {
  background: #22c2d6;
  color: #F8FFE5;
}
.tile--128 {
  background: #17f8be;
  color: #F8FFE5;
}
.tile--256 {
  background: #ffd470;
  color: #F8FFE5;
}
.tile--512 {
  background: #eb184a;
  color: #F8FFE5;
}
.tile--1024 {
  background: #14727e;
  color: #F8FFE5;
}
.tile--2048 {
  background: #05a47b;
  color: #F8FFE5;
}
.tile--pop {
  -webkit-animation: pop 0.3s ease-in-out;
          animation: pop 0.3s ease-in-out;
  -webkit-animation-fill-mode: forwards;
          animation-fill-mode: forwards;
}
.tile--shrink {
  -webkit-animation: shrink 0.5s ease-in-out;
          animation: shrink 0.5s ease-in-out;
  -webkit-animation-fill-mode: forwards;
          animation-fill-mode: forwards;
}

.add {
  position: absolute;
  opacity: 0;
  left: 120%;
  top: 0;
  font-size: 1rem;
  color: #1B9AAA;
}
.add.active {
  -webkit-animation: add 0.8s ease-in-out;
          animation: add 0.8s ease-in-out;
}

@-webkit-keyframes add {
  0% {
    opacity: 1;
    top: 0;
  }
  100% {
    opacity: 0;
    top: -100%;
  }
}

@keyframes add {
  0% {
    opacity: 1;
    top: 0;
  }
  100% {
    opacity: 0;
    top: -100%;
  }
}
@-webkit-keyframes pop {
  0% {
    -webkit-transform: scale(0.5);
            transform: scale(0.5);
    opacity: 0;
  }
  90% {
    -webkit-transform: scale(1.1);
            transform: scale(1.1);
    opacity: 1;
  }
  100% {
    -webkit-transform: scale(1);
            transform: scale(1);
    opacity: 1;
  }
}
@keyframes pop {
  0% {
    -webkit-transform: scale(0.5);
            transform: scale(0.5);
    opacity: 0;
  }
  90% {
    -webkit-transform: scale(1.1);
            transform: scale(1.1);
    opacity: 1;
  }
  100% {
    -webkit-transform: scale(1);
            transform: scale(1);
    opacity: 1;
  }
}
@-webkit-keyframes shrink {
  0% {
    -webkit-transform: scale(1);
            transform: scale(1);
    opacity: 1;
  }
  100% {
    -webkit-transform: scale(0.9);
            transform: scale(0.9);
    opacity: 0.9;
  }
}
@keyframes shrink {
  0% {
    -webkit-transform: scale(1);
            transform: scale(1);
    opacity: 1;
  }
  100% {
    -webkit-transform: scale(0.9);
            transform: scale(0.9);
    opacity: 0.9;
  }
}
.end {
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  background: rgba(85, 85, 85, 0.9);
  color: white;
  font-size: 2rem;
  -webkit-transition: opacity 0.3s ease-in-out;
  transition: opacity 0.3s ease-in-out;
}
.end btn {
  margin-top: 1rem;
}
.end.active {
  opacity: 1;
  z-index: 1000;
}

.monkey {
  font-size: 3rem;
  margin: 1rem 0;
}

.btn {
  font-family: inherit;
  font-size: 1rem;
  border: none;
  background: #1B9AAA;
  letter-spacing: 1px;
  color: white;
  font-weight: 300;
  padding: 0.9em 1.5em;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn:hover {
  background-color: #14727e;
}
.btn:active {
  background-color: #0d4a52;
}
.btn:focus {
  box-shadow: 0 0 10px #0d4a52 inset;
  outline: none;
}

.not-recommended {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  margin-top: 3rem;
}
.not-recommended * + * {
  margin-left: 10px;
}
.not-recommended__item + .not-recommended__annotation:before {
  font-size: 30px;
  content: "😐";
}
.not-recommended__item:hover + .not-recommended__annotation:before {
  content: "😟";
}
.not-recommended__item:focus + .not-recommended__annotation:before {
  content: "😄";
}
.not-recommended__item:active + .not-recommended__annotation:before {
  content: "😨";
}
